Ilocos-Central Luzon Basin is a sedimentary basin and stratigraphic formation in the Ilocos Region and Central Luzon Region, Philippines.
Stratigraphic groupings
Ilocos
Suyo Schist - greenschist, serpentinite, chert
Ilocos Peridotite - serpentinized peridotite
Bangui Formation - sandstone, conglomerate, mudstone; includes olistostrome
Magabobbo Limestone - micritic limestone, calcarenites, minor argillites
Bojeador Formation - conglomerate, graywacke, shale, limestone and associated volcanic flows and pyroclastics Pasaleng Quartz Diorite Dagot Limestone - reefal limestone, calcarenites, biosparites, minor calcareous volcanic conglomerate, particularly at the base and middle section Batac Formation - thinly bedded sandstone and shale; conglomerate Pasuquin Limestone - limestone with minor calcareous conglomerate, calcirudite, calcarenite Uplifted Coral Reefs
Luzon Central Valley
West side
Aksitero Formation - Lower Bigbiga Limestone – micritic limestone with tuffaceous turbidites and minor chert; Upper Burgos Member – Limestone, tuffaceous sandstone, siltstone and mudstone. This is coequival with Bigbiga Limestone. Moriones Formation - interbedded sandstone, shale, conglomerate with minor limestone; identified members are Sansotero Limestone and Malo Pungatan Limestone Malinta Formation - Lower Pau Sandstone – sandstones with minor tuffaceous shale, conglomerates and lapilli tuff; Upper Aparri Gorge Sandstone – sandstones with shale stringers and conglomerate lenses Tarlac Formation - interbedded sandstone, shale, conglomerate Amlang Formation - turbiditic sandstones and shale with minor conglomerates Cataguintingan Formation - mainly tuffaceous sandstones, with interbeds of siltstones, shales and conglomerate and minor limestone lenses Bamban Formation - tuffaceous sandstone and lapilli tuff with basal conglomerate. Damortis Formation - sandstone, calcarenite, siltstone, limestone and marl